... 9g/cc above; 3.Bending strength: 1700; 4.High wear-resistant. high precision tungsten carbide ball: 1. material : WC 94%,Co ... , high precision , high antirust capability, high wear-resistant capability. 4. Application: grinding, hardness examine machine, avigation , grinding machine, ... head pressure, and so on 5. Mode of transportation : delivery by sea , by air , ...